Role of extracellular polymeric substances in leaching and bioconcentration of benzophenone-3 from microplastic fragments
- Authors
- Achar, Jerry Collince; Na, Joorim; Im, Hyungjoon; Jung, Jinho
- Issue Date
- 15-8월-2021
- Publisher
- ELSEVIER
- Keywords
- Algae; Leachate; Microplastic; Plastic additive; Water flea
- Citation
- JOURNAL OF HAZARDOUS MATERIALS, v.416
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF HAZARDOUS MATERIALS
- Volume
- 416
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/127655
- DOI
- 10.1016/j.jhazmat.2021.125832
- ISSN
- 0304-3894
- Abstract
- Adverse effects of microplastics (MPs) are exacerbated by plastic additives such as benzophenone-3 (BP-3). The aim of the present study was to evaluate the role of extracellular polymeric substances (EPS) of Chlorella vulgaris in leaching BP-3 additive (3.0 +/- 0.2% wt/wt) from polyethylene MP fragments (99.8 +/- 4.1 mu m) and subsequent bioconcentration in Daphnia magna. BP-3 leaching in M4 medium was higher at pH 8 than at pH 6, because of the higher solubility of BP-3 (pK(a) = 7.07) at pH 8. However, EPS reduced BP-3 leaching in M4 medium, possibly because of repulsive interactions between the negatively charged EPS and anionic BP-3. Thus, BP-3 leaching was greater at lower pH (6 > 8) and EPS concentration (20 > 50 mg L-1 as total organic carbon), which was well related to BP-3 sorption capacity of EPS. Although BP-3 uptake in D. magna was decreased at pH 8 by increasing EPS concentration, the bioconcentration of BP-3 in D. magna was increased, possibly because of reduced BP-3 elimination. These findings suggest the important role of EPS in the bioconcentration of anionic plastic additives, which should be further evaluated to understand the underlying toxicokinetic mechanisms.
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Collections - College of Life Sciences and Biotechnology > Division of Environmental Science and Ecological Engineering > 1. Journal Articles
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